Division of Athletic Training, School of Applie 00d Health Sciences and Wellness, College of Health Sciences and Professions, Ohio University, Athens.
Ohio Musculoskeletal and Neurological Institute, Ohio University, Athens.
Int J Sports Med. 2021 Apr;42(4):344-349. doi: 10.1055/a-1244-9959. Epub 2020 Oct 5.
Current recommendations for return-to-play decision-making involve comparison of the injured limb to the uninjured limb. However, the use of the uninjured limb as a comparison for hop testing lacks empirical evidence. Thus, the purpose of this study was to determine the effects of lower extremity injury on limb symmetry and performance on the single-leg hop for distance. Two-hundred thirty-six adolescent athletes completed the single-leg hop for distance before the beginning of the season (pre-injury). Forty-four adolescent athletes sustained a lower extremity injury (22 ankle and 12 knee) and missed at least three days of sports participation. All individuals had completed the single-leg hop for distance before the beginning of the season (pre-injury) and at discharge (post-injury). Injured limb single-leg hop for distance significantly decreased at return-to-play from pre-injury with a mean decrease of 48.9 centimeters; the uninjured limb also significantly decreased, with a mean decrease of 33.8 centimeters. Limb symmetry did not significantly change pre- to post-injury with a mean difference of 1.5%. Following a lower extremity injury, single-leg hop for distance performance degrades not only for the injured limb but also the uninjured limb. However, limb symmetry did not change following a lower extremity injury.
目前的复出决策建议涉及将受伤肢体与未受伤肢体进行比较。然而，使用未受伤肢体进行跳跃测试缺乏经验证据。因此，本研究的目的是确定下肢损伤对单腿跳跃距离的肢体对称性和表现的影响。236 名青少年运动员在赛季开始前（受伤前）完成了单腿跳跃距离测试。44 名青少年运动员下肢受伤（22 例踝关节和 12 例膝关节），至少错过 3 天的运动参与。所有个体在赛季开始前（受伤前）和出院时（受伤后）都完成了单腿跳跃距离测试。从受伤前到复出时，受伤肢体的单腿跳跃距离明显下降，平均下降 48.9 厘米；未受伤肢体也明显下降，平均下降 33.8 厘米。受伤前后肢体对称性无显著差异，平均差异为 1.5%。下肢损伤后，单腿跳跃距离不仅对受伤肢体而且对未受伤肢体的表现都会下降。然而，下肢损伤后肢体对称性并未改变。
